Ummm….no. Sorry.
It appears more dramatic for primilarly because the verticle difference between 40% and 20% is three times as large in the line graph as the stacked columns (relative to the width).
It is secondarily because time is properly spaced.

When I see a stacked column chart like this: (via Andrew Sullivan) I immediately want to remake it as a line chart, like this: The decline in households with two parents and children appears more dramatic in the line chart, primarily because it has the right spacing of time.